Western Digital Ultrastar 0B50402 internal hard drive 28 TB 7200 RPM 512 MB 3.5" Serial ATA III

Trusted, field-proven reliability with CMR technology.

Ultrastar DC HC5090 accelerates AI data center scale with massive capacity in a proven, power-efficient design. Delivering 28TBs in the existing footprint, this drive maintains a steady power profile while boosting TB per watt—so you can store more data, drive higher efficiency, and scale without adding power or space. Delivers trusted, field-proven reliability with CMR technology—enabling fast qualification and seamless deployment for mixed workloads.

Ultra-Dense Storage for the AI Era and Beyond
AI workloads generate massive amounts of unstructured data. Ultrastar DC HC5090 with proven CMR technology, helps ensure that you can scale, manage, and extract data insights efficiently, from cloud to edge.

Drive Data Center Efficiency at Scale
Boost data center efficiency with improved watts per terabyte and enhanced racklevel density, enabling you to store more data using less power and physical space. By reducing energy consumption and cooling requirements while maximizing storage output per rack, Ultrastar DC HC5090 helps lower operational costs and supports more sustainable, environmentally responsible infrastructure at scale.

Tiered Storage for the AI Pipeline
Designed for high-throughput, sequential and mixed workloads, Ultrastar DC HC5090 is built to handle the demands of modern AI and analytics environments. It enables fast, efficient data ingest, staging, and retrieval across large-scale datasets. By delivering consistent, predictable performance for streaming and bulk data operations, it helps eliminate bottlenecks in data pipelines, accelerating time to insight while maintaining TCO efficiency for tiered storage.

Reliability You Can Trust
Our customers choose Ultrastar for peace of mind—because WD delivers resilience engineered for real-world complexity. Trusted to perform at scale. Proven to deliver. Ultrastar is engineered for seamless reliability from qualification to production. Ultrastar delivers reliability you can count on, with annual AFR as low as 0.35%2 backed by a 5-year limited warranty3.

Ultrastar Puts Customer Needs First
Customer success drives the Ultrastar roadmap. WD collaborates with customers to solve real-world data storage challenges—ensuring our innovation and long-term roadmap are anchored in their business outcomes, not just technical features. We simplify adoption and reduce risk through early engagement and strategic alignment—becoming a trusted partner in our customers’ journey.

Innovation That Matters
From ePMR and Helioseal® to OptiNAND™ and ArmorCache™, Western Digital innovations push the limits of HDD technology. Purpose-built for customer requirements, these advancements enable greater capacity, superior data integrity, and dependable performance—powering next-generation AI data centers.